3 The human kidney removes urea from the blood.   3.1  Name two other substances the kidney removes from the blood. (2)

QUESTION 7  

  TOTAL QUESTION 8

4.2 Reflexes in animals and phototropism in plants are both responses to stimuli.   4.2.1 Give two similarities between the mechanisms involved in each response (2)

  TOTAL QUESTION 9 

8.3 Chips are cooked by frying them in lipid (oil). Some of this lipid is left on the surface of the chips after cooking. The diagram shows three different shaped chips from the same potato. Each chip has the same mass.     Right-click on the button below to open Fig 8.3        

9.13 The diagram shows a simple reflex arc. Which labelled part is the sensory neurone? (1)   Right-click on the blue button to open Fig 9.13      

5.5 Plants need to absorb mineral ions from the soil to enable them to produce other biological molecules. Complete the table by giving the missing information.     Mineral ion absorbed Biological molecule produced magnesium protein (2)

  QUESTION 1

  QUESTION 2